Knowledge is free, we as a people can help each other to collectively create and share it for the benefit of humanity as a whole. Please share any tools that can help in achieving this goal.
According to Wikipedia, Open educational resources (OER) are freely accessible, openly licensed text, media, and other digital assets that are useful for teaching, learning, and assessing as well as for research purposes. There is no universal usage of open file formats in OER.
The term OER describes publicly accessible materials and resources for any user to use, re-mix, improve and redistribute under some licenses.